User1520731567 posted
Hi tadbirgaran,
I try to make a demo according to your link,and I do reproduce the same issue by after upgrading from 3.x to 4.9.2.
Maybe some data is lost during the upgrade process.
I uninstall the Tinymce and install-package TinyMCE.MVC.JQuery again,and this time, I do not upgrade from 3.x to 4.9.2
directly.
But The interval between my upgraded version is very small.
For example:
3.4.7 ->4.0.0->4.5.0->4.7.0-4.9.2
Now it works fine.
I suggest you could try this method.
Best Regards.
Yuki Tao